-85.86% is the change from 580 to 82
Calculation steps:
[( 82 - 580 ) ÷ 580] x 100 = -85.86%
Formula
Percentage change = [(82 - 580) / 580] x 100
Subtract the new number by the original number
82 - 580 = -498
-498 ÷ 580 = -0.8586206896551725
-0.8586206896551725 x 100 = -85.86%